Repair your speakers perfectly with new surrounds in a simple way.
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- Опубликовано: 23 окт 2017
- English spoken. How to clean, center and refoam a speaker with great result with tools you already might have at home. P.S.-1: Cotton swabs for make-up can be easy to work with. PS.-2: Colorless alcohol (IPA) will do great. Surrounds, repair kits, etc, at www.repairyourspeakers.com (EN/DE/NL). We got about 40 refoam video's and 30 new designed edges.
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Vary well done. I expect your video to help lots of audiofile out there
I love the little tricks you used to set the foam.. I never thought to do that .. I definitely will from now on
Good evening, thanks, and thanks for your reply! Best regards, Fred
Beware of the glue !
I'm currently in the middle of the repair of Magnat Monitor B woofers.
On first speaker, my first foam inner rim assembly has been weary ( leaky glue, instruments sticking to the foam ...), mainly because of the use I've made of the glue : too much glue and too little drying time before assembly.
Advise 1 : apply the glue as shown in this video, on both opposing parts, in a rather thin layer - excess of glue is here your worst enemy - and let it dry for 10 minutes ! I repeat let it dry at room temperature for 10 minutes.
And then you can assemble the parts so much easily and with great precision. You will manage to stick the foam inner rim as flatly as can be on the cone. This second speaker looks like brand new ! Just for the 10 minute drying time. I wish I 'd been give this tip beforehand !
Good evening,
First thanks for your reply and tip. About the glue is a lot to say. We have on our webshop a short story: www.repairyourspeakers.com/index.php/en/glue-brush-fluid/c-3. The drying time of the adhesive depends on a few conditions: How warm is the environment? The drying time differs if the ambient temperature is 19 or 36 degrees Celsius. How thick do you apply the adhesive? And do you use adhesive on both materials to be treated or just one? Furthermore, the drying time also depends on how porous the material is. If it concerns plastic, for example, the adhesive will dry less quickly than on paper / cardboard.
Best regards, Fred
Hi Fred, Don' t get me wrong I feel so grateful to have the opportunity to revive those speakers. My comment is just a matter for a greater finish. I understand that drying time might differ here and there and now and then. Today it was 10 minutes. The disappearing whiteness and appearing translucent aspect might be another indicator. The glue has also been of a great help to repair the black wood veneer which was peeling in some places. I bought a spare foam surround, so I might take another chance at making a redo at my first speaker some times. All the best!
All you need to do is play music through it while gluing the outside down. The music will center it.
Good afternoon, you mean like this: www.repairyourspeakers.com/en/repair-videos/repair-with-tone-generator/c-160 ? Best regards, Fred
Here is a trick that will help with whoever decides to do this. Once the outer layer of glue is applied, and you going to bond the surround o it...play a very low frequency signal through the speaker. The excursion will help to centre the speaker while you lining things up. It doesnt have to be played loud. you just want a low frequency signal so the cone can move up and down. Its this...or remove dust cap and use shims in the inside to keep thing centred. You going to have to replace with a new dust cap.
Hi Fred. Do you have guide on your site for centering using this method? What exactly are you feeling / listening for when you're tapping?
Good afternoon, when the voice coil under the cone is not centered, it will make a kind of rattling sound. That's the coil rubbing against the upper pole plate, and can damage the coil. Best regards, Fred
What about attaching underneath the cone? My speakers were originally done that way, so my thought is to keep it original.
Good morning,
You're absolutely right, we like to keep the speaker also as much as possible as original. You can see how we handle a repair with a surrounds underneath the cone on: ruclips.net/video/VJLbZifNjZQ/видео.html and ruclips.net/video/_dJnT1VrVmA/видео.html. We want to make more video’s about refoaming a surround underneath the cone. Often a video + editing etc. takes a lot of time. But if we have the time we will for instance take some more difficult surrounds, for instance Dynaudio or JBL, where often between the roll and cone is some distance. Best regards, Fred
Hi just watched your very informative video ...can you tell me what glue you used,is PVA Glue or something different,thank you.
Good evening, thanks for your reply. Sorry for our late reply. Everything about our glue can be found, in English, on the following link: www.repairyourspeakers.com/en/repair-videos/glue-brush-fluid/c-3 . With best regards, Fred.
I have a pair of B & W Speakers. The midrange and woofer are Kevlar and Aluminum cones respectively. The glue is kind of a yellowish brown and seems to have crystalized. I'm not having much success getting it removed enough for the new surrounds. Is there something that can be used to melt/dissolve the old glue? 99% alcohol doesn't phase it. Thanks for any help you can provide. Hoping I don't have to junk these speakers. The maple cabinets are just beautiful.
Good morning, thanks for your reply. If the old glue is flat and still strong on the cone, it should be possible to mount the surround over it. Please be gentle with both cones, but extra with the aluminium mid-range. It is not always good to remove all the glue and risk damage of the cone. If the old glue is not strong enough you can try a white piece of cotton on your finger with a bit of sticker-remover, and try to remove some glue at the outer edge of the cone. Please also take care of yourself and take care of enough fresh air. All at own risk. With best regards. Fred
Handig! Ik vroeg me al af hoe dat het beste kon gebeuren. Hoe was het (luister-)resultaat uiteindelijk?
Goedemorgen, eerlijk gezegd heb ik de tweede speaker van de set nog niet hersteld. Het kan namelijk goed zijn dat ik dit eens ga doen met behulp van een toongenerator. Niet iedereen heeft een toongenerator of een soorgelijks iets, maar ik wil het toch graag op een video en RUclips zetten. Vriendelijke groet, Fred Buist
zijn goeie speakertjes die bose 301's
You can buy foam / rubber surrounds, glue, brush or repairkits at www.repairyourspeakers.com. Check our quality at www.ebay.com/usr/audiofriends.
P.S. Audiofriends had the first clothes peg manual before RUclips, already in 2007: www.audiofriends.nl/pdf.
Which kind of glue applies?
Good morning,
Thanks for your reply. You can use the speaker glue provided by Audiofriends, also a very well tested glue: ruclips.net/video/OF_j-54Zf7U/видео.html. Tip: On RUclips people often use Aleene's Tacky Glue. Stays flexible, dries up colourless. Use at own risk (!).
Best regards, Fred
If you've got 20 years of experience centering the cone that way then it might work. I've got zero experience doing this so I've decided to use the tone generator method.
First thanks for your reply. Actually the tone generator method may be an easier way to center the cone. Also known on RUclips. Maybe I will make a video about it, but I always keep in mind that most people don’t have the tools for this kind of centering at home. A cd-player with a cd with test signal and an old amplifier may do the job. We have by the way short test signals on www.repairyourspeakers.com/manuals/Testsignals. Best regards, Fred
What kinda glue are you using?
Good evening,
Thanks for your reply. If you like, we have a lot of information on the following link in English: www.repairyourspeakers.com/en/manuals-for-repair/glue-brush-fluid/c-3.
Best regards, Fred
We have used this method for about 20 years: www.repairyourspeakers.com/manuals.
Critical comments or questions are welcome!
Audiofriends Can u help me please?
I have a pink music speeker and it just fall on the ground and it don't works anymore.
It is doing a strange sound like
a helicopter
Good evening, ai! Can you maybe send a picture of the speaker to fred@audiofriends.nl?
Hi!!, what is the liquid in the blue glass???? I'm searching repair kit for Jbl LX44G and on a German website (shop) there is option for "remover", what is your advice? Do you think I can use just alcohol even on the edge of the cone? thanks so much in advance for your help and great video by the way it is really helfull
What kinda glue do you use?
Good evening, sorry for the late reply, I didn't saw the reply. Best is to mail to info@audiofriends.nl. Best regards, Fred
this is not the way to centre a speaker, sorry.. you need a battery or some power ................................................. a 1.5 battery will centre the speaker perfectly
Good evening, thanks for your reply. Sorry for our late reply. There are indeed various options for centering a speaker, for example 'shimming', and working with a signal of around 30-35 Hertz for a woofer. These methods are also available on our webshop: www.repairyourspeakers.com/en/repair-videos/c-1 . However, these aforementioned methods also have disadvantages. Removing the dust cover for 'shimming' is not always possible and not desirable. For more information see: www.repairyourspeakers.com/en/frequenty-asked-questions/15-more-about-the-dustcap-story/c-45 . Centering with a tone generator also has some disadvantages. It is more cumbersome anyway, even with a mobile phone, an amplifier, connecting wires, etc. Not everyone has that ready. Furthermore, the litz wires from the terminal to the cone also give a force that influences the position of the cone and thus the voice coil. That is not with every woofer, but often with smaller speakers with sturdy litz wires, for example with the Bose 901 loudspeaker units. Best regards, Fred.
@@audiofriends254 I'm wholly sure you are right there, Fred - all methods might have both pros and cons. The important thing is that one knows what one is doing. Your vid is one of the absolute best on the matter, and I'm gonna follow your directions with my Sonab Carlsson OD-11.
Good morning, thanks for your reply. Indeed, I guess every method has advantages and disadvantages. We let the customer also decide what he wants, with links to other methods: www.repairyourspeakers.com/en/repair-videos-short/c-118 (short list). Best regards, Fred.